Set of headphones



FIG. 1 is a front, top, and right-side perspective view of a set of headphones showing the new design;

FIG. 2 is a front elevation view of FIG. 1;

FIG. 3 is a rear elevation view of FIG. 1;

FIG. 4 is a left-side elevation view of FIG. 1;

FIG. 5 is a right-side elevation view of FIG. 1;

FIG. 6 is a top plan view of FIG. 1;

FIG. 7 is a bottom plan view of FIG. 1;

FIG. 8 is a rear, top, and left-side perspective view of FIG. 1; and,

FIG. 9 is a front, top, and right-side perspective view of FIG. 1 with the headphones turned upward. 

CLAIM The ornamental design for a set of headphones, as shown and described. 